Les croiseurs cuirassés firent la différence dans la bataille d'Ulsan (1904), la guerre russo-japonaise (1904-1905) et la bataille de Tsushima (1905). Mais, dès 1907, ils devinrent vite obsolètes quand la Royal Navy commença à engager les croiseurs de bataille de classe Invincible puis les cuirassés de classe Dreadnought.
Die Bezeichnung Panzerkreuzer kam mit den um 1930 gebauten Panzerschiffen der Deutschland-Klasse nochmals in Gebrauch. Diese Schiffe wurden aufgrund der Auflagen aus dem Versailler Vertrag entworfen, die den Bau von echten Großkampfschiffen untersagten. Der Streit darum, ob sich die krisengeschüttelte Weimarer Republik den Bau neuer größerer Kampfschiffe überhaupt leisten könne, wurde 1928 als sogenannte Panzerkreuzer-Debatte im Reichstag ausgetragen und führte zu einer Regierungskrise.
The Russian navy became the first to produce an armored warship intended for commerce raiding, with 'General-Admiral', begun in 1870 and launched in 1873, often referred to as the first armored cruiser. Armed with six 8-inch (203 mm) and two 6-inch (152 mm) guns, she and her sister 'Gerzog Edinburgski' were not fully armored but protected only by a narrow belt along the waterline. This belt, moreover, was so heavy that it sat below the ships' waterlines, which limited its benefit still further. Since they were iron-hulled, however, they were more durable than their wooden counterparts. With a top speed of only 12.3 knots (22.8 km/h) and a high coal consumption, which necessitated a full sailing rig, they were not really suited for the role of cruiser. Nevertheless, these ships were considered a new threat to British commerce in the event of war, the rationale being that any vessel, regardless of its speed, could technically be a threat to overseas commerce.
https://en.wikipedia.org/wiki/Armored_cruiser
https://de.wikipedia.org/wiki/Panzerkreuzer
https://fr.wikipedia.org/wiki/Croiseur_cuirass%C3%A9